Question

A stone is dropped in a well of depth 500 m and a sound is heard after 12 seconds. Then what is the speed of sound

Answer 1

the speed of sound in this particular case is 250m/s

Answer 2

Answer: 250m/s

Explanation:

Using newton's 3rd eq^n of motion:-

s=ut+1/2at^2

500=0+1/2 (10) (t)^2

500=1/2 (10) (t)^2

t^2=(500*2)/10

t= root(100) s=10s  {here,t is time of sound}

12 s=10 s+X s

X s=2 s

Now, as V=S/t :-

V=500/2= 250m/s